Inflation valve



FIG. 1 is a perspective view of an inflation valve showing our design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is an end view thereof; and,

FIG. 7 is the opposite end view thereof. 

The ornamental design for an inflation valve, as shown and described. 